clyde attngek



ARTIFIcIAL apnic Specification-o1? Letter-silatent. J

Application led August 23, 1915. S`ae.ria1`1lo.47,902.A

To all wwm z't may concern.'

Be it known that I, CLYDE AUNGER, a citizen of the United States,residing in the c1ty and county of San Francisco and State ofCalifornia,have invented a certain new and useful Improvement inArtificial Hands, of which lthe following is a specification. v

My invention relates to artificial hands wherein separable hooksmatching with each other, are adapted to be partially ro tated. when theelbow is bentso as to bring the'hooks or an article held therein intoproper position when the arm or hand is raised toward the mouth or head.

The present state of the art discloses various forms of artificial armshaving movable lingers and rotatable hands thereon but it has been foundfrom experience that the movable lingers are not convenient for pickingup and holdingy table utensils, tools and the like and moreover areeasily broken in lifting heavy objects. Persons who have had their armsamputated grow accustomed to the conspicuousness of their loss to suchan extent that a serviceable device is preferred to one less convenientwith a better appearance. j The object therefore of this invention, is310 to provide a convenient and eicient device which is capable of thegreatest number of uses and at the same time simple of construction andoperation as well as cheap and lightin weight.

A stationary hook, while it answers the purpose of lifting and conveyingheavy objects, is not'adapted for eating, brushing the hair or teeth,removing or replacing the hat and such objects, for the reason that anobject such as a knife and fork, tooth brush,

comb or the like, would not be in proper position when-the elbow of thewearer' of the said hook was bent, but would extend from the stationaryhook away from the head or mouth.

I propose tofprovide an improved artificial hand which is adapted forvarious uses, may be quickly and easily opened and closed and partiallyrotated by the natural bending of the elbow so as to simulate the turn?ing movement of the wrist as in raising food to the mouth. f Iaccomplish these features by means of the device disclosed in thedrawings form-` i 5'5 ing a part of the Apresent specification,

wherein like characters of reference are used to designate similar partsthroughout the said specification and` drawings, and in wh1ch f Figure 11s a broken vertical sectional view of the endl of a socket adapted tobe fastened to the stump of an amputated arm,

disclosing the manner in which the several parts are arranged. Fig. 2 isa bottom view of the metallic cup removed from `the end of the socket.Fig. 3 is a top View of the me Patente@ aug. s, 1916.y

tallic cup with the hooks removed, and Fig.

4 is ,a view of the socket attached to the amputated arm.

Referring to the drawings, the numeral 1 is used to 'designate a socketadapted to be s.

fastened tothe stump of an amputated arm and having bular extension' 3formed integral therewith 6 having a longitudinal squared aperture 7 ametallic cup 2 secured to the end thereof. The metallic cup 2 has a tuf,75 within which is rotatably mounted the therethrough. A hook 8 isprovided with a I square shank 9 adapted`Vv to engage the squaredaperture 7, and having a reduced cylindrical groove 11 therein',adaptedto'bey engaged by va suitable latch. 12 lslidably I mounted uponthe plate C andv having a cen- 1 f tral slot therein comprising acircular por.

tion 14 adapted to engage the reduced cylinu l drical portion or groove11' of the square I shank 9 of the hook 8 and thereby retainsaid hook 8,and a substantially square portion y16 Vadapted to permit the passageofi the said shank 9. A suitable spring` 31a? is larranged to normallyretain the circular portion 14` over the end of the squaredaperture 'Zin* l. the plate 6. A suitable pin 18 is securedA to one end of thelatch .12 and extends .through a slot 19 in the plate 6 andan arcuateslot- 21 having a lateral extension-22 therein, kin

the metallic cup 2, the purposel of which will hereinafter be more fullydescribed. The socket l has metallic side bars 23 secured to one endtl1ereof;and pi-vlotally` mounted upon similar metallic Iside ,bars, 24l securedto a fasteningmeans 2 6adapted to. l

be fastened to the arm `above the elbow.l

rlhe metallic side bars 24 have an arcuate eX-. tension 27 connectingthe endsl thereof and passing around the elbow ofthe wearer.L ,I cord 28has one end secured tothe extension;

27 at a point directly back ofthe elbow andy the other vendthereofextendsalong ythe back of the socket-l andthroughlan aperture'29,

therein,v and after passingy ovei-asuitable pulley 31 is secured to apin 32 inthe plate 6 so that vwhen the elbowis bent to raise the socket1 thefsaid cord 28 will pull upon the pm 32 and partially` rotatev thesaid plate 6 and the hook 8 detachably secured thereto. 'When lthe armis extendedor returned to" a substantially straight position a suitablespring 33, secured to the plate 6 and to the inner surface of themetallic cup 2, normally returns or rotates the plate 6 and the hook 8to a normal position. y

While the plate 6 and hook 8 detachably secured thereto are rotating,the pin 18 traverses the'arcuate slot 21`thereby locking the 'latch 12and preventing the hook 8from being inadvertentlydetached from the plate6 while the hook 8 is carrying an article,

'i so.

as the said hook can only be detached from the plate 6 by moving the pin18 into the extension 22 of the slot 21 thereby causing the squareportionl of the slot within said 'latch ,12, to coincide. with the endof the square aperture? when the square shank 9 of the hook may bewithdrawn.

A secondhook 36 is provided with an arm 37 and is pivotally mounted uponthe hook 8 as at 38. The hook 36 is adapted to match with the hook 8 andto normally closev thereon by means of. a suitable spring 39. A cord 41has one end thereof secured tothe endxof the arm 37 and after passingthrough a suitable aperture v4 2 in the metallic cup 2a-nd a' suitableaperture 43 near the end v of the socket l, also passes through asuitable guide 43 secured to the metallic side ybars23 and has its otherend fastened or secured to a shoulder'piece 44. The hook 36 is alsoprovided with an extension 46 against vwhich an article secured betweenthe hooks 8 and 36 may be held and thereby further supported.

The device may be operated as follows: A certain pressure of certainshoulder muscles on the part of the wearer will tend to tighten the cord41 which is also connected to the arm 37 of the hook 36 and cause theseparation of the hooks 36 and 8 for the purposel of grasping anarticle. When said pressure is released the spring 39 will close-thehooks '8 and 36 upon each other and thereby firmly grasp the article. Ifthe article grasped should bea fork containing food to be carried to themouthof the wearer, the hooks 8 and 36 will be partially rotatedsubstantially through an arc of 90 degrees thereby bringing the foodinto a ,position where it may be easily received 8 and 36 will beeffectively secured against detachment by means lof the circular portion14 of the latch 12 which engages the cylindrical groove 11.. on theshank 9 of the hook 8.

y .e V'jel From the foregoing it is obvious that I of the elbow. I havealso'provided an improved artificial hand which is simple, cheap anddurable in construction as well as 1noperation. I

I am aware lthat the present state of the art discloses' matching hooksadapted to be separated by a certaln pressureof certain shouldermuscles, therefore I do not wish to claim such a combination broadly asmy invention butf What'I do claim and desire Letters'Patent is 1. Anartificial hand comprising a socket adapted to be fastened onto thestump of an amputated arm; a hook detachably and rotatably mounted inand extending beyond the end of the socket; a second hook pivotallymounted upon the first mentioned hook and arranged to form a grippingmeans to secure by therewith; fastening means pivotally con-A,

nected tothe socket and ad'apted to be fastened to the arm above theelbow; and means operatively connected to the hooks and tol .thefastening means whereby said hooks may wearer is bent.

2. An artificial hand comprising a socket adapted to be fastened to thestump of an amputated arm; a plate rotatably mounted within the end ofthe socket; a ,hook detachably secured to the plate; a second hookpivotally mounted upon the 'first mentioned hook and arranged to form agripping element therewith; fastening means pivotally connected to thesocket and arrange'dto be secured to the arm above the elbow; means'operatively connected to the hooks and to the fasteningvv means wherebythe said hooks may be partially rotated when the elbow of the wearer isbent; and means operatively connected to the plate and adapted todetachably secure the first mentioned hook thereto. l

3. An artificial hand comprising a socket adapted to be fastened to thestump of an amputated arm; a plate rotatably mounted within the end of asocket; a hook detachably secured to the plate; a second hook pivotallymounted upon the first mentioned hook and arranged to form a grippingelement therewith; fastening means pivotally connected to the socket andarranged to be secured to the arm above the elbow; means operativelyconnected to the hooks and to the fastening means whereby the said hooksnected to the plate and adapted to detach' ably secure the firstmentioned hook; and means operatively connected tothe socket and to theplate and adapted to normally rev turn said plate and the hooksdetachably securedthereto to a normal position when the elbow and arm ofthe wearer is straightened.

4. Ann artificial hand. comprising a socket l adapted to .be securedto''the stump of an amputated arm; fastening means pivotally connectedto the socket and adapted to secure the same to the arm; a platerotatably mounted within the end o f the socket; a hook detachablysecuredto the plate; a second hook having lan arm thereon and pivotallymounted 'uponv the first mentioned hook and matching therewith;asuitable spring adapted to normally close the hooks together; a cordfastened to the arm of the second mentioned hook and to the shoulder ofthe wearer whereby the hooks may be separated; a second, cord secured tothe rotatable plate and to the fastening means of the socket and adaptedto partially rotate the hooks when the elbow is bent; and means adaptedto return the plate and hooks secured thereto to a normal position whenthe arm is extended.

,5. An artificial hand comprising a socket adapted to be secured to thestump of an amputated arm; fastening means pivotally connected to thesocket and adapted to se cure the same to the arm; a plate rotatablymounted within the end of the socket; a hook detachably secured to theplate; a second hook having an arm thereon and pivotally mounted uponthe first mentioned hook and matching therewith; a suitable springadapted to normally close the hooks together; a cord fastened to the armof the second mentioned hook and to the shoulder of the wearer wherebythe hooks may be separated; a second cord secured to the rotatable plateand to the fastening means of the socket and adapted to partially rotatethe hooks when the elbow is bent; and a suitable spring .operativelyconnected to the rotatable plate and to the socket and adapted tonormally retain the said plate in a normal position.

6. An artificial hand cou'iprising a socket adapted to be fastened tothe stump of Van amputated arm; fastening means pivotally mentioned hookan suitable spring'adapted to normally close the,

v adapted to and the hoo is when the elbow is bent; and

a suitable 'spring adapted to normally return connected to the socketand adapted to fasten the same to a`n arm; a metallic cup rigidlysecured tothe end of the socket and having a tubular extension thereto;a plate' having a sleeve rotatably mounted within the tubu- A larextension and' a' squared longitudinal aperture through said sleeve andlate; a hook 'havin a square shank mounted within the square4 aperture;vmeans adapted tordetachably secure the square shank within the saidaperture; .a second hook havingv an arm thereon and pivotally mountedupon the first matching therewith; a

hooks; a cord secured to the arm onthe sec-v ond .hook and to shoulderofthe wearerwhereby the hooks may be separated; a second cord secured tothe rotatable plate and to the fastening means of the socket anda-rtially `rotate the said plate the plate and v hooks thereon toanormal position when the arm is extended.

7. An artificial hand comprising a socket adapted to be fastened to thestump of an amputated arm; fastening means pivotally connected to thesocket and adapted to fasten the same to an arm; a metallic cup rigidlysecured to the end of the socket and having a tubular extension thereto;a plate having a sleeve rotatably mounted within the tubular extensionand a squared longitudinal aperture through said sleeve and plate; ahook having a square shank mount ed within the squared aperture;a-fsuitable latch adapted to detachably secure `the square shank withinthe said aperture; a second hook having an arm thereon 'and pivotallymounted upon and matching with the first mentioned hook; a suitablespring adapted to normally close the hooks; a cord secured to the arm onthe second hook and to the shoulder of the wearer whereby the hooks maybe separated; a second cord secured to the rotatable plate and to thefastening means of the socket and yadapted to partially rotate the saidplate and the hooks whenthe elbow is bent; and a suitable spring adaptedto-normally return the plate and hooksthereon to a normal position whenthe arm is extended.

In witness whereof I hereunto set my signature.

oLYDE AUNGEi.

